diff --git a/grammar b/grammar
index e576f37..b89deb0 100644
--- a/grammar
+++ b/grammar
@@ -33,6 +33,8 @@ PITCH_MODIFIER = 'b' | '#'
 <argdeflist> ::= '(' ')' | '(' <typedVariable> <argdeflist>
 <argdeflist> ::= <typedVariable> ', ' <argdeflist> | ')'
 
+<argdef> = <type> <typeSpecifier>? <identifier> '...'? | <typeSpecifier> <identifier> '...'?
+
 <typedVariable> ::= <type> <typeSpecifier>? <identifier>
 
 <map> ::= '{' '}' | '{' <mapEntry> <mapTail>
diff --git a/smnp/ast/node/function.py b/smnp/ast/node/function.py
index 8d1fdbe..8539e5e 100644
--- a/smnp/ast/node/function.py
+++ b/smnp/ast/node/function.py
@@ -1,10 +1,11 @@
 from smnp.ast.node.block import BlockNode
+from smnp.ast.node.expression import ExpressionNode
 from smnp.ast.node.identifier import IdentifierNode
 from smnp.ast.node.iterable import abstractIterableParser
 from smnp.ast.node.model import Node
 from smnp.ast.node.none import NoneNode
 from smnp.ast.node.statement import StatementNode
-from smnp.ast.node.variable import TypedVariableNode
+from smnp.ast.node.type import TypeNode
 from smnp.ast.parser import Parser
 from smnp.token.type import TokenType
 
@@ -16,6 +17,48 @@ class ArgumentsDeclarationNode(Node):
         raise RuntimeError("This class is not supposed to be automatically called")
 
 
+class ArgumentDefinitionNode(ExpressionNode):
+    def __init__(self, pos):
+        super().__init__(pos)
+        self.children.append(NoneNode())
+
+    @property
+    def type(self):
+        return self[0]
+
+    @type.setter
+    def type(self, value):
+        self[0] = value
+
+    @property
+    def variable(self):
+        return self[1]
+
+    @variable.setter
+    def variable(self, value):
+        self[1] = value
+
+    @classmethod
+    def parser(cls):
+        def createNode(type, variable):
+            node = ArgumentDefinitionNode(type.pos)
+            node.type = type
+            node.variable = variable
+            return node
+
+        return Parser.allOf(
+            TypeNode.parse,
+            Parser.doAssert(IdentifierNode.identifierParser(), "variable name"),
+            createNode=createNode
+        )
+
+    @classmethod
+    def _parse(cls, input):
+        #TODO
+        raise RuntimeError("Not implemented yet. There is still required work to correctly build AST related to IdentifierNode")
+
+
+
 class FunctionDefinitionNode(StatementNode):
     def __init__(self, pos):
         super().__init__(pos)
@@ -64,4 +107,4 @@ class FunctionDefinitionNode(StatementNode):
 
     @staticmethod
     def _argumentsDeclarationParser():
-        return abstractIterableParser(ArgumentsDeclarationNode, TokenType.OPEN_PAREN, TokenType.CLOSE_PAREN, TypedVariableNode.parser())
\ No newline at end of file
+        return abstractIterableParser(ArgumentsDeclarationNode, TokenType.OPEN_PAREN, TokenType.CLOSE_PAREN, ArgumentDefinitionNode.parser())
\ No newline at end of file
diff --git a/smnp/ast/node/variable.py b/smnp/ast/node/variable.py
index 68b830f..b28b04f 100644
--- a/smnp/ast/node/variable.py
+++ b/smnp/ast/node/variable.py
@@ -1,46 +1,3 @@
-from smnp.ast.node.expression import ExpressionNode
-from smnp.ast.node.identifier import IdentifierNode
-from smnp.ast.node.none import NoneNode
-from smnp.ast.node.type import TypeNode
-from smnp.ast.parser import Parser
 
 
-class TypedVariableNode(ExpressionNode):
-    def __init__(self, pos):
-        super().__init__(pos)
-        self.children.append(NoneNode())
 
-    @property
-    def type(self):
-        return self[0]
-
-    @type.setter
-    def type(self, value):
-        self[0] = value
-
-    @property
-    def variable(self):
-        return self[1]
-
-    @variable.setter
-    def variable(self, value):
-        self[1] = value
-
-    @classmethod
-    def parser(cls):
-        def createNode(type, variable):
-            node = TypedVariableNode(type.pos)
-            node.type = type
-            node.variable = variable
-            return node
-
-        return Parser.allOf(
-            TypeNode.parse,
-            Parser.doAssert(IdentifierNode.identifierParser(), "variable name"),
-            createNode=createNode
-        )
-
-    @classmethod
-    def _parse(cls, input):
-        #TODO
-        raise RuntimeError("Not implemented yet. There is still required work to correctly build AST related to IdentifierNode")
diff --git a/smnp/runtime/evaluators/function.py b/smnp/runtime/evaluators/function.py
index 102b603..92c7247 100644
--- a/smnp/runtime/evaluators/function.py
+++ b/smnp/runtime/evaluators/function.py
@@ -1,6 +1,6 @@
+from smnp.ast.node.function import ArgumentDefinitionNode
 from smnp.ast.node.none import NoneNode
 from smnp.ast.node.ret import ReturnNode
-from smnp.ast.node.variable import TypedVariableNode
 from smnp.error.runtime import RuntimeException
 from smnp.function.signature import signature
 from smnp.runtime.evaluator import Evaluator, evaluate
@@ -45,7 +45,7 @@ def argumentsNodeToMethodSignature(node):
         sign = []
 
         for child in node.children:
-            if type(child) == TypedVariableNode:
+            if type(child) == ArgumentDefinitionNode:
                 if type(child.type.specifiers) == NoneNode:
                     sign.append(ofType(child.type.type))
                 elif child.type.type == Type.LIST and len(child.type.specifiers) == 1: